Revert 273825 "Tentatively enable StartupBrowserCreatorFirstRunT..."

Revert 273825 "Tentatively enable StartupBrowserCreatorFirstRunT..."

Reason: the tests still fail.

> Tentatively enable StartupBrowserCreatorFirstRunTest.* on official Mac builder.
> 
> I recently fixed some places which passed empty URLs around (r272182), and these
> tests might have been failing because of the empty URL behavior (empty URLs were
> treated as the home page, and maybe the home page is something different on the
> official Mac builder than other builders).
> 
> Feel free to revert this commit if the tests fail.
> 
> R=bartfab@chromium.org
> TBR=sky@chromium.org
> BUG=314819
> 
> Review URL: https://codereview.chromium.org/308083004

TBR=marja@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=274262

[marja, 2014-06-02 16:55:56]

Committed patchset #1 manually as r274262.